package com.example.handler;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.example.commom.R;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.ServletOutputStream;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.InternalAuthenticationServiceException;
 import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.web.AuthenticationEntryPoint;
 import org.springframework.stereotype.Component;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 /**
 * 客服端进行认证数据的提交，匿名用户访问无权限资源的处理类
 */
 @Component
 public class AnonymousAuthenticationHandler implements AuthenticationEntryPoint 
{
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse 
       response, AuthenticationException authException) throws IOException,
     ServletException {
        //设置客户端的响应的内容类型
        response.setContentType("application/json;charset=UTF-8");
        String result = null;
        //获取输出流
        ServletOutputStream outputStream = response.getOutputStream();
        System.out.println(authException.getMessage()+"=="+authException);
        // System.out.println("异常消息:"+authException.getMessage()+",对象:"+authException);
        if (authException instanceof BadCredentialsException) {
            // 用户名未找到，可以在这里添加自定义处理逻辑
            result = JSON.toJSONString(R.error().code(HttpServletResponse.SC_UNAUTHORIZED).message(authException.getMessage()), SerializerFeature.DisableCircularReferenceDetect);
        } else if (authException instanceof InternalAuthenticationServiceException) {
            result = JSON.toJSONString(R.error().code(HttpServletResponse.SC_UNAUTHORIZED).message("用户名为空!"), SerializerFeature.DisableCircularReferenceDetect);
        } else {
            // 其他身份验证异常处理
            result = JSON.toJSONString(R.error()
                            .code(600).message("匿名用户无权限访问！"),
                    SerializerFeature.DisableCircularReferenceDetect);  //消除循环引用
        }
        outputStream.write(result.getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}